Facile access to spirobifluorene-fused chiral multi-resonance materials with ultra-narrowband blue emission  

基于螺二稠合策略实现超窄光谱的圆偏振多重共振型OLED发光材料

作　　者：Hu Cheng Chen-Hao Guo Meng Li Yusong Guo Zhangyi Fu Junjie Liu Yudong Yang Jingbo Lan Zhengyang Bin 程虎;郭晨浩;李猛;郭余松;傅彰谊;刘俊杰;杨宇东;兰静波;宾正杨

机构地区：[1]Key Laboratory of Green Chemistry and Technology of Ministry of Education,College of Chemistry,Sichuan University,Chengdu 610064,China [2]Beijing National Laboratory for Molecular Sciences,Chinese Academy of Sciences,Beijing 100190,China

出　　处：《Science Bulletin》2025年第4期529-535,共7页科学通报(英文版)

基　　金：supported by the National Key R&D Program of China(2021YFA1500100);the National Natural Science Foundation of China(22371196,22275127,22031007,and 22071162);Natural Science Foundation of Sichuan,China(2022NSFSC0029).

摘　　要：Narrowband multiple resonance(MR)emitters with circularly polarized luminescence(CPL)hold significant promise for three dimension organic light-emitting diode(3D-OLED)displays.In this work,we present a simple method for developing a new type of 9,9′-spirobifluorene-based CP-MR emitters by a recrystallization resolution technology and chlorine(Cl)-directed electrophilic borylation reaction,both of which significantly enhance the efficiency and scalability for mass production.This approach allows for integrating an asymmetric 9,9′-spirobifluorene core between two MR frameworks to achieve optically active CP-MR emitters.The highly rigid spirobifluorene framework minimizes structural relaxation,and meanwhile,the introduction of a cyano(CN)group enhances the MR emission characteristics,leading to an ultra-narrowband blue emission with full width at half maximum(FWHM)of 14 nm.As a result,these molecules facilitate the assembly of narrowband blue CPL-OLEDs with a maximum external quantum efficiency(EQEmax)of 30.7%and an impressive narrow FWHM of 16 nm,representing the first instance of an FWHM below 20 nm in CPL-OLEDs.

关 键 词：Circularly polarized luminescence Multiple resonance 9 9'-Spirobifluorene Ultra-narrowband emission Organic light-emitting diodes 

分 类 号：O62[理学—有机化学]